Joomla development. Quiet simply I need some addresses changed

After a website change I am now left with 2 web addresses pointing to each web page. The developer who changed the website has moved country and I need someone to change the addresses as detailed below. This needs to be done asap and must be inline with the company running the SEO.

Please redirect the URLs with .html extension to without .html extension, for e.g-


http://www.adducology.com/student-services/university-interview-training.html to
http://www.adducology.com/student-services/university-interview-training


http://www.adducology.com/student-services/ucas-personal-statements.html to
http://www.adducology.com/student-services/ucas-personal-statements


http://www.adducology.com/career-services/covering-letter-writing.html to
http://www.adducology.com/career-services/covering-letter-writing


http://www.adducology.com/career-services/cv-writing.html to
http://www.adducology.com/career-services/cv-writing


http://www.adducology.com/career-services/covering-letter-writing.html to
http://www.adducology.com/career-services/covering-letter-writing


http://www.adducology.com/student-services/university-interview-training.html to
http://www.adducology.com/student-services/university-interview-training


http://www.adducology.com/vmcareerservices.html to
http://www.adducology.com/vmcareerservices


http://www.adducology.com/student-services/ucas-personal-statements.html to
http://www.adducology.com/student-services/ucas-personal-statements


http://www.adducology.com/career-services/cv-writing.html to
www.adducology.com/career-services/cv-writing

http://www.adducology.com/career-mentors/become-a-mentor.html to
http://www.adducology.com/career-mentors/become-a-mentor

http://www.adducology.com/career-mentors/find-a-mentor.html to
http://www.adducology.com/career-mentors/find-a-mentor


http://www.adducology.com/career-days.html to
http://www.adducology.com/career-days

and so on.